This is a follow up to a post under the Windows 7 category about active windows losing focus.
I have done some more testing and the problem appears to be centered around Firefox 13.0.1 - I am also using Flash 11.3.300.262 and Java 184.108.40.2060.3
Whenever I have the web site for the Wall Street Journal [http://www.marketwatch.com/] open in a tab, I will randomly see Firefox (or other windows) lose focus, even while I am typing into a text field. I can sometimes cause it to happen by clicking the refresh button in Firefox. This webpage does not seem to play well with the latest Firefox running under Windows 7 Pro x64 with the Flash and Java versions above.
The webpage has a lot of information that is updated continuously over time (stock prices, Dow market average, etc.). This information is even updated in the background, when other windows apps are in use. I suspect that the loss of focus occurs when the page data is updated by some timer.
1. The problem started about the time I installed version 13.0.1 and Flash 11.3. I have not tried an earlier version of Firefox.
2. After I closed the Firefox tab for that website, my system has not lost focus on any window for the past 3 hours.
3. When using IE the webpage works fine and does not lose focus on the same system.
4. A Laptop running Windows XP and Firefox 12.0, Flash 11.3.300.257, Java 220.127.116.11.5 does NOT lose focus on any windows when displaying that webpage.
There are too many variables for me to try in order to pinpoint exactly what is causing the loss of focus, but this is very annoying and could happen with other websites. I hope this information helps others who may experience similar behavior.